click here max9140max9141 40ns low-power 3v5v rail-to-rail ...€¦ · 40 35 50 45 55 15 30 45 60...

General DescriptionThe MAX9140/MAX9141 are single and the MAX9142/MAX9144 are dual/quad high-speed comparators optimized for systems powered from a 3V or 5V supply. The MAX9141 features latch enable and device shutdown. These devices combine high speed, low power, and rail-to-rail inputs. Propagation delay is 40ns, while supply current is only 150μA per comparator.The input common-mode range of the devices extends beyond both power-supply rails. The outputs pull to within 0.3V of either supply rail without external pullup circuitry, making these devices ideal for interface with both CMOS and TTL logic. All input and output pins can tolerate a continuous short-circuit fault condition to either rail. Internal hysteresis ensures clean output switching, even with slow-moving input signals.The devices are higher-speed, lower-power, and lower-cost upgrades to industry-standard comparators MAX941/MAX942/MAX944.The MAX9140 are offered in tiny 5-pin SC70 and SOT23 packages. The MAX9141 and MAX9142 are available in 8-pin SOT23 and SO packages, while the MAX9144 is available in both 14-pin SO and TSSOP packages.

Applications Line Receivers Battery-Powered Systems Threshold Detectors/Discriminators 3V/5V Systems Zero-Crossing Detectors Sampling Circuits

Features Fast, 40ns Propagation Delay (10mV Overdrive) Low Power

• 150μA Supply Current Per Comparator (3V) Optimized for 3V and 5V Applications Rail-to-Rail Input Voltage Range Low, 500μV Offset Voltage Internal Hysteresis for Clean Switching Outputs Swing 300mV of Power Rails CMOS/TTL-Compatible Outputs Output Latch (MAX9141 Only) Shutdown Function (MAX9141 Only) Available in SC70 and SOT23 Packages AEC-Q100 Qualified (MAX9140AAXK/V+T Only)

19-2064; Rev 9; 10/19

Click here for production status of specific part numbers.

1

2

3

4

8

7

6

5

N.C.

OUT

GND LE

SHDNIN-

IN+

VCC VCC

VCC

SOT23/SO

1

2

3

4

8

7

6

5

OUTB

INB-

INB+GND

INA+

INA-

OUTA

SOT23/SO

14

13

12

11

10

9

8

1

2

3

4

5

6

7

OUTD

IND-

IND+

GND

INA+

INA-

OUTA

INC+

INC-

OUTCOUTB

INB-

INB+

TSSOP/SO

TOP VIEW

A

B

A D

B C

GND

IN-IN+

1 5 VCCOUT

SC70/SOT23

2

3 4

MAX9142MAX9141

MAX9144

MAX9140

MAX9140/MAX9141/MAX9142/MAX9144

40ns, Low-Power, 3V/5V, Rail-to-RailSingle-Supply Comparators

Pin Configurations

https://www.maximintegrated.com/en/storefront/storefront.html

Power-Supply Ranges Supply Voltage (VCC to GND) ...........................................+6V IN+, IN- to GND .................................... -0.3V to (VCC + 0.3V) LE Input Voltage (MAX9141 only) ........ -0.3V to (VCC + 0.3V) SHDN Input Voltage (MAX9141 only) .. -0.3V to (VCC + 0.3V)

Current into Input Pins .....................................................±20mAInput/Output Short-Circuit Duration to

VCC or GND ..........................................................ContinuousContinuous Power Dissipation (TA = +70°C)

5-Pin SC70 (derate 3.1mW/°C above +70°C) .............247mW 5-Pin SOT23 (derate 7.1mW/°C above +70°C) ..........571mW

8-Pin SOT23 (derate 9.1mW/°C above +70°C) ..........727mW 8-Pin SO (derate 5.9mW/°C above +70°C) ..............470.6mW 14-Pin TSSOP (derate 9.1mW/°C above +70°C) ........727mW 14-Pin SO (derate 8.33mW/°C above +70°C) ..........666.7mW

Operating Temperature Range E grade ........................................................... -40°C to +85°C A grade ......................................................... -40°C to +125°C

Junction Temperature ......................................................+150°CStorage Temperature Range ............................ -65°C to +150°CLead Temperature (soldering, 10s) .................................+300°C

(VCC = 5V, VCM = 0V, SHDN = LE = VCC (MAX9141 only), CL = 15pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSOperating Supply Voltage VCC (Note 2) 2.7 5.5 V

Input Voltage Range VCMR (Note 3) -0.2 VCC + 0.2 V

Input Offset Voltage VOS (Note 4)TA = +25°C 0.5 2.0

mVTA = -40°C to +85°C 4.5MAX9140AA_ _ 6.0

Input Hysteresis VHYST (Note 5) 1.5 mV

Input Bias Current IB (Note 6)TA = -40°C to +85°C 90 320

nAMAX9140AA_ _ 350

Input Offset Current IOSTA = -40°C to +85°C 8 120

nAMAX9140AA_ _ 140

Common-Mode Rejection Ratio CMRR VCC = 5.5V (Note 7)

TA = -40°C to +85°C 80 800µV/V

MAX9140AA_ _ 850

Power-Supply Rejection Ratio PSRR 2.7V ≤ VCC ≤ 5.5V

TA = -40°C to +85°C 80 750µV/V

MAX9140AA_ _ 800

Output High Voltage VOHISOURCE = 4mA

TA = -40°C to +85°C VCC - 0.425

VCC - 0.3 V

MAX9140AA_ _ VCC - 0.47

Output Low Voltage VOL ISINK = 4mATA = -40°C to +85°C 0.3 0.425

VMAX9140AA_ _ 0.45

Output Leakage Current ILEAK SHDN = GND, MAX9141 only (Note 8) 0.04 1 µA

MAX9140/MAX9141/MAX9142/MAX9144


www.maximintegrated.com Maxim Integrated 2

Absolute Maximum Ratings

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Electrical Characteristics

(VCC = 5V, VCM = 0V, SHDN = LE = VCC (MAX9141 only), CL = 15pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

Note 1: All devices are 100% production tested at TA = +25°C. Specifications over temperature are guaranteed by design.Note 2: Inferred from PSRR test.Note 3: Inferred from CMRR test. Note also that either or both inputs can be driven to the absolute maximum limit (0.3V beyond

either supply rail) without damage or false output inversion.Note 4: VOS is defined as the center of the input-referred hysteresis zone. See Figure 1.Note 5: The input-referred trip points are the extremities of the differential input voltage required to make the comparator output

change state. The difference between the upper and lower trip points is equal to the width of the input-referred hysteresis zone. See Figure 1.

Note 6: The polarity of IB reverses direction as VCM approaches either supply rail.Note 7: Specified over the full common-mode voltage range (VCMR).Note 8: Specification is for current flowing into or out of the output pin for VOUT driven to any voltage from VCC to GND while the part

is in shutdown.Note 9: Specified between any two channels in the MAX9142/MAX9144.Note 10: Specified as the difference between tPD+ and tPD- for any one comparator.Note 11: Applies to the MAX9141 only for both SHDN and LE.Note 12: Applies to the MAX9141 only. Comparator is active with LE driven high and is latched with LE driven low (VOD = 10mV). See

Figure 2.Note 13: Applicable to the MAX9141 only. Comparator is active with the SHDN driven high and is shutdown with SHDN driven low.

Shutdown enable time is the delay when the SHDN is driven high to the time the output is valid. Shutdown disable time is the delay when the SHDN is driven low to the time the comparator shuts down.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Current (Per Comparator) ICC

VCM = VCC = 3V

MAX9141 165 275

µA

MAX9140, TA = -40°C to 85°C 150 250

MAX9140AA_ _ 360MAX9142/MAX9144 150 250

VCM = VCC = 5V

MAX9141 200 320MAX9140, TA = -40°C to 85°C 165 300

MAX9140AA_ _ 400MAX9142/MAX9144 165 300

MAX9141 only, SHDN = GND; VCC = VCM = 3V 12 30

Propagation Delay tPD+, tPD-

VCC = 3V, VOD = 10mV 40 ns

Differential Propagation Delay dtPD VOD = 10mV (Note 9) 2 nsPropagation Delay Skew VOD = 10mV (Note 10) 2 ns

Logic Input-Voltage High VIH (Note 11) (VCC/2) +0.4 VCC/2 V

Logic Input-Voltage Low VIL (Note 11) VCC/2 (VCC/2) -0.4 V

Logic Input Current IIL, IIH VLOGIC = 0 to VCC (Note 11) 2 10 µAData-to-Latch Setup Time tS (Note 12) 16 nsLatch-to-Data Hold Time tH (Note 12) 16 nsLatch Pulse Width tLPW (Note 12) 45 nsLatch Propagation Delay tLPD (Note 12) 60 nsShutdown Enable Time (Note 13) 1 µsShutdown Disable Time (Note 13) 5 µs

MAX9140/MAX9141/MAX9142/MAX9144



Electrical Characteristics (continued)

(VCC = 3.0V, VCM = 0V, CL = 15pF, VOD = 10mV, TA = +25°C, unless otherwise noted.)

320

322

326

324

328

330

-40 0-20 20 40 60 80 100

OUTPUT LOW VOLTAGEvs. TEMPERATURE

MAX

9140

TO

C02

TEMPERATURE (°C)V O

L (mV

)

ISINK = 4mA

5.00

5.05

5.10

5.15

5.20

-40 0-20 20 40 60 80 100

OUTPUT HIGH VOLTAGEvs. TEMPERATURE

MAX

9140

TO

C03

TEMPERATURE (°C)

V OH

(V)

ISOURCE = 4mAVCC = 5.5V

35

40

45

50

-40 0-20 20 40 60 80 100

OUTPUT SHORT-CIRCUIT (SINK) CURRENTvs. TEMPERATURE

MAX

9140

TO

C04

TEMPERATURE (°C)

OUTP

UT S

HORT

-CIR

CUIT

SIN

K CU

RREN

T (m

A)

15

25

35

45

-40 0-20 20 40 60 80 100

OUTPUT SHORT-CIRCUIT (SOURCE) CURRENT vs. TEMPERATURE

MAX

9140

TO

C05

TEMPERATURE (°C)

OUTP

UT S

HORT

-CIR

CUIT

SOU

RCE

CURR

ENT

(mA)

0

100

50

200

150

250

300

3 4 5 6

MAX9140 SUPPLY CURRENTvs. SUPPLY VOLTAGE

MAX

9140

toc0

1

VCC (V)

I CC

(A)

TA = +85∞C

TA = +25∞C

TA = -40∞C

0

40

20

80

60

120

100

140

-50 0 25-25 50 75 100

INPUT BIAS CURRENTvs. TEMPERATURE

MAX

9140

toc0

6

TEMPERATURE (°C)

INPU

T CU

RREN

T (n

A)

MAX9140/MAX9141/MAX9142/MAX9144


Maxim Integrated 4www.maximintegrated.com

Typical Operating Characteristics


-500

-200

-300

-400

-100

0

100

200

300

400

500

-50 0-25 25 50 75 100

INPUT OFFSET VOLTAGEvs. TEMPERATURE

MAX

9140

toc0

7

TEMPERATURE (°C)

V OS (

µV)

-1.0

-0.4

-0.6

-0.8

-0.2

0

0.2

0.4

0.6

0.8

1.0

-50 0-25 25 50 75 100

TRIP POINTvs. TEMPERATURE

MAX

9140

toc0

8

TEMPERATURE (°C)V O

S (mV

)

VTRIP+

VTRIP-

-1

1

0

3

2

6

5

4

7

-40 0-20 20 40 60 80 100

INPUT VOLTAGE RANGE vs. TEMPERATURE

MAX

9140

TOC0

9

TEMPERATURE (°C)

INPU

T VO

LTAG

E RA

NGE

(V) VCMR+

VCMR-

VCC = 5.5V

20

25

35

30

40

45

0 4020 60 80 100

PROPAGATION DELAYvs. INPUT OVERDRIVE

MAX

9140

toc1

0

INPUT OVERDRIVE (mV)

PROP

AGAT

ION

DELA

Y (n

S)

tPD+

tPD-

25

30

40

35

45

50

-50 0-25 25 50 75 100

PROPAGATION DELAYvs. TEMPERATURE

MAX

9140

toc1

1

TEMPERATURE (°C)

PROP

AGAT

ION

DELA

Y (n

s)

tPD+

tPD-

20

30

25

40

35

50

45

55

15 45 6030 75 90 105

PROPAGATION DELAYvs. CAPACITIVE LOAD

MAX

9140

toc1

2

CAPACITIVE LOAD (pF)

PROP

AGAT

ION

DELA

Y (n

s)

tPD+

tPD-

MAX9140/MAX9141/MAX9142/MAX9144


Maxim Integrated 5www.maximintegrated.com

Typical Operating Characteristics (continued)


PINNAME FUNCTION

MAX9140 MAX9141 MAX9142 MAX9144— — 1 1 OUTA Comparator A Output— — 2 2 INA- Comparator A Inverting Input— — 3 3 INA+ Comparator A Noninverting Input5 1 8 4 VCC Positive Supply— — 5 5 INB+ Comparator B Noninverting Input— — 6 6 INB- Comparator B Inverting Input— — 7 7 OUTB Comparator B Output— — — 8 OUTC Comparator C Output— — — 9 INC- Comparator C Inverting Input— — — 10 INC+ Comparator C Noninverting Input2 4 4 11 GND Ground— — — 12 IND+ Comparator D Noninverting Input— — — 13 IND- Comparator D Inverting Input— — — 14 OUTD Comparator D Output3 2 — — IN+ Noninverting Input4 3 — — IN- Inverting Input

— 6 — — SHDN Shutdown: MAX9141 is active when SHDN is driven high; MAX9141 is in shutdown when SHDN is driven low.

— 5 — — LE The output is latched when LE is low. The latch is transparent when LE is high.

1 7 — — OUT Comparator Output— 8 — — N.C. No Connection. Not internally connected.

OUTPUT2V/div

INPUT50mV/div

PROPAGATION DELAY (tPD-)

MAX

9140

TOC1

3

10ns/div

VOD = 10mVVCC = 5.5V

OUTPUT2V/div

INPUT50mV/div

PROPAGATION DELAY (tPD+)

MAX

9140

TOC1

4

10ns/div

VOD = 10mVVCC = 5.5V

OUTPUT2V/div

INPUT50mV/div

SINUSOID RESPONSE AT 4MHz

MAX

9140

TOC1

5

50ns/div

VCC = 5.5V

MAX9140/MAX9141/MAX9142/MAX9144



Pin Description

Typical Operating Characteristics (continued)

Detailed DescriptionThe MAX9140/MAX9141/MAX9142/MAX9144 single-supply comparators feature internal hysteresis, high speed, and low power. Their outputs are pulled to within 300mV of either supply rail without external pullup or pulldown circuitry. Rail-to-rail input voltage range and low-voltage single-supply operation make these devices ideal for portable equipment. The devices interface directly to CMOS and TTL logic.Most high-speed comparators oscillate in the linear region because of noise or undesired parasitic feedback. This tends to occur when the voltage on one input is at or equal to the voltage on the other input. To counter the parasitic effects and noise, the devices have an internal hysteresis of 1.5mV.The hysteresis in a comparator creates two trip points: one for the rising input voltage and one for the falling input voltage (Figure 1). The difference between the trip points is the hysteresis. The average of the trip points is the offset voltage. When the comparator’s input voltages are equal, the hysteresis effectively causes one comparator input voltage to move quickly past the other, thus taking the input out of the region where oscillation occurs. Standard comparators require hysteresis to be added with external resistors. The devices’ fixed internal hysteresis eliminates these resistors. To increase hysteresis and noise margin even more, add positive feedback with two resistors as a voltage divider from the output to the noninverting input.Figure 1 illustrates the case where IN- is fixed and IN+ is varied. If the inputs were reversed, the figure would look the same, except the output would be inverted.The MAX9141 includes an internal latch that allows storage of comparison results. The LE pin has a high input impedance. If LE is high, the latch is transparent (i.e., the comparator operates as though the latch is not present). The comparator’s output state is latched when LEis pulled low (Figure 2).

Shutdown Mode (MAX9141 Only)The MAX9141 shuts down when the SHDN pin is low. When shut down, the supply current drops to less than 12μA, and the three-state output becomes high impedance. The SHDN pin has a high-input impedance. Connect SHDN to VCC for normal operation. Exit shutdown with LE high (transparent state); otherwise, the output will be indeterminate.

Input Stage CircuitryThe devices include internal protection circuitry that prevents damage to the precision input stage from large differential input voltages. This protection circuitry consists of two back-toback diodes between IN+ and IN- as well as two series 4.1kΩ resistors (Figure 3). The diodes limit the differential voltage applied to the internal circuitry of the comparators to be no more than 2VF, where VF is the forward voltage drop of the diode (about 0.7V at +25°C).For a large differential input voltage (exceeding 2VF), this protection circuitry increases the input bias current at IN+ (source) and IN- (sink).

F(IN+ - IN-) - 2VInput Current2 4.1k

=× Ω

Input current with large differential input voltages should not be confused with input bias current (IB). As long as the differential input voltage is less than 2VF, this input current is equal to IB. The output is in the correct logic state if one or both inputs are within the common-mode range.

Figure 1. Input and Output Waveform, Noninverting Input Varied

VTRIP+

VHYST

VTRIP-

COMPARATOROUTPUT

VOH

VOL

VTRIP+ + VTRIP-2

VOS =

VIN- = 0

VIN+

MAX9140/MAX9141/MAX9142/MAX9144



Output Stage CircuitryThe MAX9140/MAX9141/MAX9142/MAX9144 contain a current-driven output stage as shown in Figure 4. During an output transition, ISOURCE or ISINK is pushed or pulled to the output pin. The output source or sink current is high during the transition, creating a rapid slew rate. Once the output voltage reaches VOH or VOL, the source or sink current decreases to a small value, capable of maintaining the VOH or VOL static condition. This significant decrease in current conserves power after an output transition has occurred.One consequence of a current-driven output stage is a linear dependence between the slew rate and the load capacitance. A heavy capacitive load will slow down a voltage output transition. This can be useful in noisesensitive applications where fast edges may cause interference.

Applications InformationCircuit Layout and BypassingThe high-gain bandwidth of the MAX9140/MAX9141/MAX9142/MAX9144 requires design precautions to real-ize the full high-speed capabilities of these comparators. The recommended precautions are:1) Use a PCB with a good, unbroken, low-inductance

ground plane.2) Place a decoupling capacitor (a 0.1μF ceramic capacitor

is a good choice) as close to VCC as possible.

3) Pay close attention to the decoupling capacitor’s bandwidth, keeping leads short.

4) On the inputs and outputs, keep lead lengths short to avoid unwanted parasitic feedback around the comparators.

5) Solder the device directly to the PCB instead of using a socket.

Figure 2. MAX9141 Timing Diagram with Latch Operator

Figure 3. Input Stage Circuitry

VOH

tLPW

OUT

tLPDtPD

VCC

0

VCC2

VCC2

VOL

LE

DIFFERENTIALINPUT

VOLTAGE

VOSVOD

tHtS

4.1kΩ

4.1kΩ

TO INTERNALCIRCUITRY

TO INTERNALCIRCUITRY

IN–

IN+

MAX9140MAX9141MAX9142MAX9144

MAX9140/MAX9141/MAX9142/MAX9144



Figure 4. Output Stage Circuitry Figure 5. 3.3V Digitally Controlled Threshold Detector

Figure 6. Line Receiver Application

ISOURCE

ISINK

VCC

GND

OUTPUT

MAX9140MAX9141MAX9142MAX9144

ANALOG IN

VSS

SERIALDIGITAL

INPUT

VDD

SDI

DACOUTC

VDD = 3.3V

VREFC

8-BIT DAC

GND

MAX512

MAX9140

03V

CLEANDIGITALSIGNAL

10kΩ

20kΩ

20kΩ

VCC = 3V

COAX LINEMAX9140

MAX9140/MAX9141/MAX9142/MAX9144



Chip InformationPROCESS: Bipolar

Note: All E-grade devices are specified over the -40°C to +85°C operating temperature range. All A-grade devices are specified over the -40°C to +125°C operating temperature range.+Denotes a lead(Pb)-free/RoHS-compliant package.-Denotes a package containing lead(Pb).T = Tape and reel.

Ordering InformationPART* PIN-PACKAGE TOP MARK

MAX9140AAUK+T 5 SOT23 +AFEJMAX9140AAXK+T 5 SC70 +ASWMAX9140AAXK/V+T 5 SC70 +AUGMAX9140EXK-T 5 SC70 ACCMAX9140EUK-T 5 SOT23 ADQPMAX9141EKA-T 8 SOT23 AAFDMAX9141ESA 8 SO —MAX9142EKA+ 8 SOT23 +AAFEMAX9142EKA+T 8 SOT23 +AAFEMAX9142ESA+ 8 SO —MAX9142ESA+T 8 SO —MAX9142EKA-T 8 SOT23 AAFEMAX9142ESA 8 SO —MAX9144EUD 14 TSSOP —MAX9144ESD 14 SO —

PACKAGE TYPE PACKAGE CODE DOCUMENT NO. LAND PATTERN NO.8 SOT23 K8-5 21-0078 90-01765 SOT23 U5-1 21-0057 90-01745 SC70 X5+1 21-0076 90-0188

14 TSSOP U14-1 21-0066 90-01138 SO S8-2 21-0041 90-0096

14 SO S14-1 21-0041 90-0112

MAX9140/MAX9141/MAX9142/MAX9144



Package InformationFor the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

http://pdfserv.maxim-ic.com/package_dwgs/21-0078.PDF

http://pdfserv.maximintegrated.com/land_patterns/90-0176.PDF











http://www.maximintegrated.com/packages

REVISION NUMBER

REVISION DATE DESCRIPTION PAGES

CHANGED0 6/01 Initial release —1 1/07 Updated Absolute Maximum Ratings with ±20mA current into input pin. 22 12/07 Added two new automotive grade products. 1, 23 1/10 Added automotive qualified part 14 6/14 Added Junction Temperature to Absolute Maximum Ratings 2

5 9/15 Removed MAX9140AAXK/V from Ordering Information and edited the Absolute Maximum Ratings 1, 2

6 10/15 Updated TOC7 and TOC8 in the Typical Operating Characteristics section 6

7 11/17 Added AEC statement to Features section and updated Ordering Information table 1, 9

8 1/19 Removed embedded package outline drawings 10–139 10/19 Updated Ordering Information 9

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.

MAX9140/MAX9141/MAX9142/MAX9144


© 2019 Maxim Integrated Products, Inc. 11

Revision History

For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.

click here max9140max9141 40ns low-power 3v5v rail-to-rail ...€¦ · 40 35 50 45 55 15 30 45 60...

Documents